postnotum
/ˌpəʊstˈnəʊtəm/Entomology
noun
The posterior part of the notum (dorsal skeleton) of a thoracic segment, when present as a distinct sclerotized region (usually regarded as intersegmental in origin).
Origin
1920s; earliest use found in Robert Tillyard (b. 1881). From post- + notum, after mesonotum and pronotum.